Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/13382
Title: Surface mechanical attrition treatment induced phase transformation behavior in NiTi shape memory alloy
Authors: Hu, T
Wen, CS
Lu, J
Wu, SL
Xin, YC
Zhang, WJ
Chu, CL
Chung, JCY
Yeung, KWK
Kwok, DTK
Chu, PK
Keywords: Martensite stabilization
NiTi shape memory alloy (SMA)
Surface mechanical attrition treatment (SMAT)
Transformation behavior
Issue Date: 2009
Publisher: Elsevier
Source: Journal of alloys and compounds, 2009, v. 482, no. 1-2, p. 298-301 How to cite?
Journal: Journal of alloys and compounds 
Abstract: The phase constituents and transformation behavior of the martensite B19′ NiTi shape memory alloy after undergoing surface mechanical attrition treatment (SMAT) are investigated. SMAT is found to induce the formation of a parent B2 phase from the martensite B19′ in the top surface layer. By removing the surface layer-by-layer, X-ray diffraction reveals that the amount of the B2 phase decreases with depth. Differential scanning calorimetry (DSC) further indicates that the deformed martensite in the sub-surface layer up to 300 μm deep exhibits the martensite stabilization effect. The graded phase structure and transformation behavior in the SMATed NiTi specimen can be attributed to the gradient change in strain with depth.
URI: http://hdl.handle.net/10397/13382
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2009.04.004
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